This week, we're exploring Nuclear Fusion, the power source of the sun. What is it and how can it help us on Earth? We'll be visiting JET, a big fusion reactor and we'll be discussing how we can recreate this fusion process here on Earth. Plus, how we light up the universe, how depression treatment alongside cancer care has the potential to transform lives, spotting the signs of dementia by looking into the eyes and how people are no smarter than pigeons when it comes to gambling...